carb updates and other troubles...

[ocbaud]

well, its running a lot stronger, i leaned the carb out about half a turn and it runs a lot better. still needs leaned out a little more.

the timing was off some. it was reading about 17degrees at idle. i moved it back down to 12 degrees. its still pinging really bad under acceleration. but its usually only under light to mild acceleration. would it be a good idea to plug the vacuum advance and see how it runs, and if it runs lots better, completely remove it?

also, i think my power steering pump is going out when ever i start it up its making a whining/whistling sound, sorta like a geardrive, but not really. it also makes the sound even louder when i rev it up in park. and yet still makes it louder when ever i'm turning the wheel any amount over half a turn. how much would a replacement pump be?

[low 84]

1. you most likely need to switch springs or adjust something (i don't know what exactly in an msd) to pull out some of your total timing. did you check your total timing. should have it in the neighborhood of 36.

2.turning the mixture screws on the carb have little effect of the rich/leaness of the carb under trottle. they are only largley effecting the idle settings

3.you did try toping off the fluid in your p.s. pump didn't you? if so and its still going out, they are cheap and easy to replace

[NeCrOmAnCeR]

Since it seems you have been having lots of timing troubles, it wouldn't hurt for you manually found TDC again (I know, like the 5th time now?) and again checke the timing tape. Then set the base timing with the vac advance disconnected. Low 84 has a very good point. What springs etc are in the MSD dizzy?
Idle mix screws ONLY effect idle, nothing else. Also, I hope you are breaking the engine in proper before you are running it hard. New engines typically are not that hard to set up, it seems like something simple, which has been overlooked, is causing all your troubles. Take an old spark plug and make a TDC stop and find TDC the correct way, then go from there.

With the dynamic compression ratio that cam is giving you, pinging should not be a problem on good gas. Which leads me back to checking the timing again.

[ocbaud]

the timing does seem off, because it is missing.

how would i go about making a tdc checker with an old spark plug?

also, adjusting the idle mixture screws was the only thing i did to make it run better.

the ps pump is full of fluid

[76HighSierra]

Originally posted by ocbaud


how would i go about making a tdc checker with an old spark plug?

Here's what you need, ocbaud!!

[ocbaud]

i'm using the small silver and small blue springs with a blue bushing in my dizzy.

it should start the advance at about 1400rpm's and be fully advanced at about 2400 rpm's at 22 degrees. that, with my 12 degrees of initial advance should get me 34 degrees.

[ocbaud]

Originally posted by 76HighSierra


Here's what you need, ocbaud!!

how would i go about ordering that, and getting it here by 6:00pm tommrow, on easter sunday?

[NeCrOmAnCeR]

Break the porcelen (SP??) out of an old plug, saving the metal threaded part and remove the ground strap from the bottom.
Go to the hardware store or your bolt bin in the garage and find a long bolt (long threaded portion, about 4 inches) or all-thread (easiest) just slightly larger than the inside diameter of the hollowed out plug (usually a 3/8 bolt works). Then tap the plug to accept the bolt. Clean the whole thing well to remove any glass and/or metal. Remove the #1 spark plug from the engine and insert your new TDC tool. Screw the bolt into the plug about halfway. Then slowly (by hand) turn your engine till the #1 piston hits the stop, mark the balancer, then rotate the engine over the opposite way again till it hits the stop, mark the balancer again. TDC is in the exact center of the two marks. If the engine does not hit the stop, screw the bolt in more. Remove the tool, reinstall the spark plug and adjust the timing tape as needed.

Spend the $14 on some gas. But that is exactly what it will look like when done.

A few days ago you said you set the timing at 12, and now it's at 17, May want to make sure the dizzy is clamped down good. But as I've said before I think the troubles you are having is due to timing issues. Good luck!

[76HighSierra]

Yes, necromancer is right. I was just pulling your leg. When you break the porcelain out of the plug, wear safety goggles. That sh*t LOVES to go straight for your eyes! Ask me how I know . The problem is, there's not much meat on the sparkplug, once you bust out the porcelain, so it may be difficult to tap it to a size of an available bolt. I made mine, by mig welding a 3/8ths nut on the outer end of the plug, then cut a piece of 3/8ths all-thread (app. 3 inches long), threaded it into the welded nut, then threaded another 3/8ths nut over the all-thread, to act as a locker (once you adjust the all-thread the way you want it). It's worked for me for over 10 years and only cost me about 2 dollars and took 15 minutes to make.

[toytruck]

Put the silver bushing in. Keep the Light silver & light blue springs. If you want to for now you can lock out the vacuum advance. You can hook it up later when you get the timing right.

[ocbaud]

Originally posted by toytruck
Put the silver bushing in. Keep the Light silver & light blue springs. If you want to for now you can lock out the vacuum advance. You can hook it up later when you get the timing right.

why the silver bushing? would it be better to swap my springs for 2 light blue springs?

[toytruck]

The silver bushing is for 25 degrees. The silver & blue springs will bring all the timing in by 3000 rpms. You need more timing later and higher than what you are getting now. What kind of timing light do you have? Does it have a dial on it? If it does you can set the dial for 36 and hold the motor at 3000 rpms and adjust the dist for 0 degrees on the pointer.

[ocbaud]

no dial on it. if its pinging right now, what would putting in the silver bushing do but give advance me more? dont i want the advance curve to come in a little slower since the engine is really only pinging under part throttle?

[toytruck]

No. Becuase of that converter you want it quicker.

[ocbaud]

well wouldnt the setup i have now work? what would it help by adding more advance to it?

[ocbaud]

the carb is a lot better. i leaned it out a bit more and it seems to be running better.

although, it is still pinging under acceleration and has a really bad miss when the rpms climb up.

[ocbaud]

i changed my plug gap from .050 to .045 and it seemed to help some.

[79BIG10]

Eric with you having old gas in the tank and not 91 octane this would cause it to ping. Have you added some octane booster or at least some fresh gas in there?

[ocbaud]

i've gone through a tank and a half of fresh new 91 octane. one of those tanks had octane booster in it too.